Giant otters live in tight knit family groups that are dominated by a breeding pair, the rest of the group consists of their offspring up until the age of reproduction. Giant otters become mature between the ages of 3 and 5 years old. Group sizes can vary but have been recorded of up to 20 individuals in some instances. Typically group sizes are seen more along 2-10 individuals. The entire family group helps to raise the young and they all work together to find and acquire food. Because they hunt in a pack like structure some of giant otter nicknames are water dogs and river wolves.